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WILLIAM H. WARREN, or WORCESTER, MASSACHUSETTS. Letters Patent No.73,412,dated January 14, 1868.

IMPROVEMENT IN GRANK PLANERS.

KNOW ALL MEN' BY THESE PRESENTS:

That I, W. H. WARREN, of the city and county of Worcester, andCommonwealth of Massachusetts, have invented certain new and usefulImprovements in flrank Planers and other similarly-operated machines;and I do hereby declare that the following is a full, clear, and exactdescription of the some, reference being had to the accompanyingdrawings, forming apart of this specification, in which-#- Figure 1represents a front view of so much of a crank-planer as is necessary toillustrate my invention,

Figure 2 represents a plan view, and I Figure 3 represents alongitudinal central section on.line A B, figgl, of the crankwperatingmechanism.

To enable those skilled in the art to which my invention belongs to makeand use the same, I will proceed to describe it more in detail.

In cranklaners and other similar machines, it is often desirable toreduce -or increase theithrow of the crank, to give a greater or lessmotion to the table of the planer, or whatever is to be moved by thecrank; and f the'nature ofmy invention consists in mechanism. soconstructed-that the operator can change the throw of the' crank as maybe desired, without stopping the driving-mechanism, and withoutafiecting the stability and strength ofthe crank-connection. I

In the drawings, the part marked A is the frame, upon the top of whichare the ways 13 B, between and upon which the table 0 works, asindicated in the drawings. 1) is the connecting-rod or connection, oneend being hinged to the table 0, and the other attached to thewrist-pina, which is fastened to the slide-piece b, which works on the dove-tailway 0, on the face of the plate E, which is fastened to side of gear F,which has its bearing on the end of a stationary cylindrical journal,"e,which passes through and is supported in the main frame A, while aplate,f, attached thereto, is also fastened to the side of the frame, togive greater strength to it. Within the tubular bearing e is a tubularshaft, g, one end of which isfastened to the face-plate E, while on theother end is fastened the gear h, which meshes into the gear 1 on shaft2, which is supported in the arm G on frame A, strengthened by the braceH. Within the tubular shaft'g is a shaft, 3, having fastened to itsouter end a gear, 4, which meshes into gear 5, loose on shaft 2, while,a bevel-gear, 6, is fastened on the inner end, to mesh into abevel-gear, 7, on the screw-shaft 8, the head of which is swivelled inthe end of the faceplate E, and its free end passing through aprojection, 9, on the slide-piece b, a thread bein tapped or cut iii theprojection 9 to fit the thread on shaft 8. v .H is a lever pivoted at 10upon the arm G, the front of the lever being made flat, and rounded outin the end, to fit the groove 11 in the pulley 12 of'shaft 2, pulley 12and shaft 2 being made and combined with a tongue and groove in such amanner that pulley 12 will always revolve with shaft 2, while at thesame time it can be moved back and forth, by means of lever H. 13 is apin projecting from the hub 14 of gear 5, the face of the pin beingbevelled off on one side, so that when lever H is moved to the positionshown in red lines, fig. 2, the bevelled part of the pin 13 will strikeagainst the shoulder 15 of lever .H as indicated in fig. 2.

The operation is as follows: Motion now being imparted to gear F, whichmay be produced by a gear, 1, upon shaft J,'driven by belt or otherwise,as gear F revolves, it carries around with it the face-plateE andvwrist-pin a, and thus imparts through the connecting-rod D areciprocating motion to table 0, upon the ways vB B. If it is desirednow to increase the motion of table C, the operator takes hold of leverH, and moves it into the position shown in dark lines, fig. 2, therebycausing gear 5, which'is loose upon shaft 2, to be pressed between gear1 andpulley 12, thus imparting a rapid motion to'gear 5, and throughthat-an increased motion to gear 4 and shaft 3, which gives motion tobevel-gears 6, 7, and screw-shaft 8.- It will be seen that as screwshaftS'is turned, it will run slide 6, to which the wrist-pin a isattached, out from the centre of motion, and thus increase the throw of,the crank and motion of table (3. When the motion of table C has beensufficiently increased, the operator releases his. hold of lever H, andthe speed of shaft 3 falls to that of the tubular shaft and as shaft 3turns, runs with the same speed as gear F, face pla-te E, and thedove-tail way 0, the slide-piece b-and wrist or crank-pin a will remainat the same distance from the centre of motion, until changed by theoperator by means of lever H. If it be desired to shorten the throw ofthe crank, and thus give a less motion to the table 0, the operatormoves lever E into the position shown in red lines, fig. 2, whereby theshoulder 15 of lever H is brought into the path of pin 13, andthemotiocn of the latter stopped, whereby the motion of gear v 4, shaft3, and bevel-gear 6, is also stopped, whilethe screw-shaft 8andbevel-gear 7 continue to revolve with plate E, and so long as thebevel-gearti remains at rest, and the bevel-gear 7 revolves around gear6, the screwshaft 8 will be turned so as to run the slide-piece b andwrist-pin a towards the centre of motion of the gear F and face-plate E,and thus shorten the throw of the crank and the movement of table Q. Assoon as the desired adjustment has been made, the operator releases hishold on lever H, and the bevel-face of pin 13 forces shoulder 15 out ofthe path of the pin, and gear 4, shaft 3, and bevel-gear Gare againallowed to revolve with and at the same speed of gear F, plate E, andgear 7, and the throw of the crank remains as thus adjusted, until it ischanged again by the operator in one of the ways above described. I

It will be observed that when the speed of the table and throw of thecrank are to be increased, the speed of shaft 3 is increased so that theshaft revolves at a greaterspeed than the tubular shaft g, gear F, andfaceplate E, while when the throw of the crank and motion of the tableare to be shortened, the speed ofshaft 3 is reduced below that of shaftg, gear F, and plate E, and in this instance the motion of shaft 3 isstopped entirely. Stops n 'n are fastened or combined with the end ofthe face-plate E, against which the slide 6 will strike when run to theextreme ends of the screw-thread of shaft 8. Slide-piece b is cut out sothat it can be run over the bevel-gear 7, to bring'the crank-pin a overthe centre of motion when desired.

The cranklaners as constructed heretofore, could beadjusted by stoppingthe machine, one mode being to fit the wrist-pin in a slot and fasten itthere by a nut, which had to be loosened and tightened ever-ytime theadjustment was made. Another mode consisted in combining the crank-pinwith a screw similar to the screwshaft 8, which shaft had to be turnedby hand, or by a wrench in the hand of the operator. All thesehandndjustments are attended with much delay and inconvenience,but whichobjections are obviated by my improvements, as will be seemespecially bythose skilled in the art to which my invention belongs.

The work to be planed is placed upon the table 0, and is moved back andforth with the table, while the tool is supported in a frame above thesame, as in the common iron planing-machines. The planer is usuallydriven by a belt running upon cone-pulleys at the side of the machine,so that the operator,'when planing short work or pieces, can quicklyincrease the speed of the machine, or vice verse. Again, he can adjustthe throw of the crank, While looking at his work, and without stoppingthe machine, and thus bring the motiqn'of the table to any desired pointwith ease and accuracy.

It will be further observed that the device for adjusting the throw ofthe crank is such that there is no liability of breaking the machine,even if the slide 5 is run both ends against the stops it 12, when beingadjusted. In the first mode of adjustment, if the slide should strikeagainst one of the stops at, the friction of wheel 12 against the sideof' gear 5 would notbe suflicient to cause any breakages, while if astep should be struck while the bevel-fzice of pin 13 rested on theshoulder 15, the bevel-face of the pin would force shoulder 15 back outof its path before any damage was done. Arrows indicate the directionsin which some of the parts move.

Having described my improvements in cranklaners and other similarmachines, what I claim therein as new and of my invention, and desire tosecure by Letters Patent, is i 1. The combination, with a crank-planeror like machine, of mechanism substantially as'hercin described,

for regulating the throw of the crank without stopping or interruptingthe continuous operation of the machine,

as shown and set forth.- p

2. The combination, with gear F and face-plate E, of the tubular shaftg, central shaft 3, screw-shaft 8, and gears 4, 7L, 6, and 'T,substantially as and for the purposes set forth.

8. The combination, with the shaft 2 and gear Let the loose gear5andpullcy 12, or its mechanical squirm lent, operating substantially inthe manner and for the purposes herein shown and described.

4. The combination, with gears 1 and 6, and pulley 12, mountedon theshaft 2, as described, of gears 4 and It, and their respective shafts,arranged for operation substantially as and for the purposes hereinshown and specified.

' 5. The combination, with the friction-pulley 12'and bevelled pin 13,of the lever H and shoulder 15, sublatantially as and for the purposesset forth.

- WILLIAM H. NVARREN.

Witnesses:

D. L. MILLER, Gno. H. MILLER.

